/* ===== page-news 专属样式 ===== */
.page-news {
  --news-gap: 1.5rem;
  --news-card-radius: 0;
  --news-timeline-node-size: 16px;
  --news-accent-stripe-width: 6px;
  display: block;
  background: var(--color-cream, #f5f0e8);
  color: var(--color-text, #2c2c2c);
  padding-top: calc(var(--header-height, 70px) + 1rem);
  padding-bottom: 2.5rem;
}

.page-news__inner {
  max-width: var(--max-width, 1280px);
  margin: 0 auto;
  padding: 0 1rem;
}

/* 面包屑 */
.page-news .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body, "Inter", "Noto Sans SC", sans-serif);
  font-size: 0.875rem;
  color: var(--color-ash, #7a7a7a);
  margin-bottom: 1rem;
  padding: 0.5rem 0;
}

.page-news .breadcrumb a {
  color: var(--color-accent, #f46d2d);
  text-decoration: none;
}

.page-news .breadcrumb a:hover {
  text-decoration: underline;
}

.page-news .breadcrumb__sep {
  color: var(--color-ash, #7a7a7a);
}

/* hero */
.page-news__hero {
  position: relative;
  margin-bottom: 2.5rem;
  padding: 0;
  border-left: 4px solid var(--color-accent, #f46d2d);
  padding-left: 1.25rem;
}

.page-news__hero-title {
  font-family: var(--font-heading, Impact, "Arial Black", sans-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary, #0a1f3d);
  margin: 0 0 0.25rem;
  letter-spacing: 0.02em;
}

.page-news__hero-desc {
  font-family: var(--font-body, "Inter", "Noto Sans SC", sans-serif);
  font-size: 1rem;
  color: var(--color-ash, #7a7a7a);
  margin: 0 0 0.75rem;
}

/* 筛选按钮 */
.page-news__filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.page-news__filter .btn {
  font-family: var(--font-body, "Inter", "Noto Sans SC", sans-serif);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.4rem 1rem;
  border-radius: 0;
  border: 2px solid var(--color-primary, #0a1f3d);
  background: transparent;
  color: var(--color-primary, #0a1f3d);
  cursor: pointer;
  transition: background var(--transition, 0.2s ease), color var(--transition, 0.2s ease);
}

.page-news__filter .btn--primary {
  background: var(--color-accent, #f46d2d);
  border-color: var(--color-accent, #f46d2d);
  color: #fff;
}

.page-news__filter .btn--outline:hover,
.page-news__filter .btn--outline:focus-visible {
  background: var(--color-primary, #0a1f3d);
  color: #fff;
}

/* 通用section标题 */
.page-news__section-title {
  font-family: var(--font-heading, Impact, "Arial Black", sans-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary, #0a1f3d);
  margin: 0 0 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-gold, #d4a843);
  display: inline-block;
}

/* ===== 时间轴 ===== */
.page-news__timeline {
  margin-bottom: 3rem;
}

.page-news__timeline-track {
  display: flex;
  gap: 1.25rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 0.75rem;
  scroll-behavior: smooth;
}

.page-news__timeline-track::-webkit-scrollbar {
  height: 6px;
}

.page-news__timeline-track::-webkit-scrollbar-track {
  background: var(--color-cream, #f5f0e8);
}

.page-news__timeline-track::-webkit-scrollbar-thumb {
  background: var(--color-gold, #d4a843);
  border-radius: 3px;
}

.page-news__timeline-node {
  flex: 0 0 85%;
  scroll-snap-align: start;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  max-width: 360px;
}

.page-news__node-icon {
  flex-shrink: 0;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary, #0a1f3d);
  color: var(--color-gold, #d4a843);
  font-family: var(--font-mono, "Roboto Mono", monospace);
  font-size: 1.1rem;
  font-weight: 700;
  position: relative;
}

.page-news__node-icon .num {
  line-height: 1;
}

.page-news__node-icon img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.page-news__node-content {
  background: #fff;
  padding: 1rem 1rem 1.25rem;
  border-radius: var(--news-card-radius);
  position: relative;
  flex: 1;
  min-width: 0;
  box-shadow: 0 2px 8px rgba(10, 31, 61, 0.08);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - 12px));
}

.page-news__node-badge {
  display: inline-block;
  background: var(--color-accent, #f46d2d);
  color: #fff;
  font-family: var(--font-mono, "Roboto Mono", monospace);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.page-news__node-date {
  display: block;
  font-family: var(--font-body, "Inter", "Noto Sans SC", sans-serif);
  font-size: 0.8rem;
  color: var(--color-ash, #7a7a7a);
  margin-bottom: 0.35rem;
}

.page-news__node-title {
  font-family: var(--font-heading, Impact, "Arial Black", sans-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary, #0a1f3d);
  margin: 0 0 0.4rem;
  line-height: 1.3;
}

.page-news__node-desc {
  font-family: var(--font-body, "Inter", "Noto Sans SC", sans-serif);
  font-size: 0.85rem;
  color: var(--color-text, #2c2c2c);
  line-height: 1.5;
  margin: 0 0 0.75rem;
}

/* ===== 文章卡片网格 ===== */
.page-news__articles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.page-news__card {
  background: #fff;
  display: flex;
  flex-direction: column;
  border-radius: var(--news-card-radius);
  position: relative;
  box-shadow: 0 2px 10px rgba(10, 31, 61, 0.06);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - 16px));
  transition: box-shadow var(--transition, 0.2s ease);
}

.page-news__card:hover {
  box-shadow: 0 4px 18px rgba(10, 31, 61, 0.12);
}

.page-news__card-stripe {
  height: var(--news-accent-stripe-width);
  background: var(--color-accent, #f46d2d);
  flex-shrink: 0;
  width: 100%;
}

.page-news__card-body {
  padding: 1.25rem 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.page-news__card-tag {
  display: inline-block;
  background: var(--color-primary, #0a1f3d);
  color: #fff;
  font-family: var(--font-mono, "Roboto Mono", monospace);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
  align-self: flex-start;
}

.page-news__card-title {
  font-family: var(--font-heading, Impact, "Arial Black", sans-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary, #0a1f3d);
  margin: 0 0 0.6rem;
  line-height: 1.3;
}

.page-news__card-img {
  margin: 0 0 0.75rem;
  width: 100%;
  max-height: 200px;
  overflow: hidden;
}

.page-news__card-img img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-news__card-excerpt {
  font-family: var(--font-body, "Inter", "Noto Sans SC", sans-serif);
  font-size: 0.9rem;
  color: var(--color-text, #2c2c2c);
  line-height: 1.6;
  margin: 0 0 0.75rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.page-news__card-full {
  margin-top: 0.5rem;
  border-top: 1px solid var(--color-cream, #f5f0e8);
  padding-top: 0.75rem;
}

.page-news__card-full p {
  font-family: var(--font-body, "Inter", "Noto Sans SC", sans-serif);
  font-size: 0.9rem;
  color: var(--color-text, #2c2c2c);
  line-height: 1.6;
  margin: 0 0 0.75rem;
}

.page-news__card-toggle {
  margin-top: auto;
  align-self: flex-start;
}

/* ===== 桌面端适配 ===== */
@media (min-width: 768px) {
  .page-news__inner {
    padding: 0 2rem;
  }

  .page-news__hero-title {
    font-size: 2.5rem;
  }

  .page-news__section-title {
    font-size: 1.75rem;
  }

  .page-news__timeline-node {
    flex: 0 0 340px;
    max-width: 340px;
  }

  .page-news__articles-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.75rem;
  }

  .page-news__card-title {
    font-size: 1.25rem;
  }
}

@media (min-width: 1024px) {
  .page-news__articles-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-news__timeline-node {
    flex: 0 0 360px;
    max-width: 360px;
  }
}

/* ===== 减少动效 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-news__timeline-track {
    scroll-behavior: auto;
  }

  .page-news__card,
  .page-news__node-content,
  .page-news__filter .btn {
    transition: none;
  }
}

/* ===== 辅助功能 ===== */
.page-news__card-toggle:focus-visible,
.page-news__filter .btn:focus-visible {
  outline: 3px solid var(--color-accent, #f46d2d);
  outline-offset: 2px;
}

/* 筛选隐藏（渐进增强） */
.page-news__card[hidden] {
  display: none;
}